Hawaii-Aleutian Standard Time[-ə lo̵̅o̅′s̸hən]
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio.
a standard time used in the zone which includes Hawaii and the western Aleutian Islands, corresponding to the mean solar time of the 150th meridian west of Greenwich, England: it is ten hours behind Greenwich time
Used by arrangement with John Wiley & Sons, Inc.
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Standard time in the tenth time zone west of Greenwich, England, reckoned at 150° west and used, for example, in Hawaii and the western Aleutian Islands.